From e8181a56b410255c85ba176dcad34b694bec673a Mon Sep 17 00:00:00 2001
From: dhawes <dhawes>
Date: Mon, 17 Jan 2005 18:03:15 +0000
Subject: [PATCH] moved functions from templib.php to rsslib.php for rss_client
 block

---
 rss/rsslib.php | 323 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 323 insertions(+)

diff --git a/rss/rsslib.php b/rss/rsslib.php
index 6003bc37731ef..27da3bf6d3fb7 100644
--- a/rss/rsslib.php
+++ b/rss/rsslib.php
@@ -321,4 +321,327 @@ function rss_full_tag($tag,$level=0,$endline=true,$content,$to_utf=true) {
     return $st.$co.$et;
 }
 
+//////////////////// LIBRARY FUNCTIONS FOR RSS_CLIENT BLOCK ////////////////
+
+//initialize config vars for rss_client block if missing
+if (empty($CFG->block_rss_client_submitters) ) {
+    $CFG->block_rss_client_submitters = 1; //default to admin only
+}
+if (empty($CFG->block_rss_client_num_entries) ) {
+    $CFG->block_rss_client_num_entries = 5; //default to 5 entries per block
+}
+if (empty($CFG->block_rss_timeout) ) {
+    $CFG->block_rss_timeout = 30;
+}
+
+/**
+ *   Determines whether or not to get a news feed remotely or from cache and reads it into a string
+ * @param int rssid - id of feed in blog_rss table
+ * @param string url - url of remote feed
+ * @param string type - either 'A' or 'R' where A is an atom feed and R is either rss or rdf
+ * @return Atom|MagpieRSS|null This function returns an Atom object in the case of an Atom feed, a MagpieRSS object in the case of an RDF/RSS feed or null if there was an error loading the remote feed.
+ * NOTE that this function requires allow_url_fopen be On in your php.ini file 
+ * (it may be off for security by your web host)
+ */
+function rss_get_feed($rssid, $url, $type) {
+    
+    global $CFG;
+    $writetofile = false;
+    $urlfailurestring = 'Failed to open remote feed at: ' . $url .'<br /> allow_url_fopen needs to be On in the php.ini file for this file wrapper call to work. Please refer to <a href="http://us2.php.net/filesystem">http://us2.php.net/filesystem</a>';
+    $filefailurestring = 'Could not open the file located at: ';
+    $secs = $CFG->block_rss_timeout * 60;
+
+    // If moodle dataroot cache folder is missing create it
+    if (!file_exists($CFG->dataroot .'/cache/')) {
+        mkdir($CFG->dataroot .'/cache');
+    }
+    // If moodle dataroot cache/rsscache folder is missing create it
+    if (!file_exists($CFG->dataroot .'/cache/rsscache/')) {
+        mkdir($CFG->dataroot .'/cache/rsscache');
+    }
+
+    $file = $CFG->dataroot .'/cache/rsscache/'. $rssid .'.xml';
+//    echo "file = ". $file; //debug
+    
+    //if feed in cache
+    if (file_exists($file)) {
+        //check age of cache file
+    //      echo "file exists $file"; //debug
+        if ($CFG->debug){
+            $data = stat($file);
+        } else {
+            $data = @stat($file);
+        }
+        $now = time();
+        if (($now - $data[10]) > $secs) {
+            // The cached file has expired. Attempt to read fresh from source
+            $xml = load_feed_from_url($url);
+            if ($xml) {
+                //success
+                $writetofile = true;
+            } else {
+                // Failed to load remote feed. Since the file exists attempt to read from cache
+                if ($CFG->debug) {
+                    print $urlfailurestring;
+                }
+                $xml = load_feed_from_file($file);
+                if (!$xml) {
+                    // Failed to load from cache as well!
+                    if ($CFG->debug) {
+                        print $filefailurestring . $file;
+                        return;
+                    }
+                }
+            }
+        } else {
+            // Cached file has not expired. Attempt to read from cached file.
+            $xml = load_feed_from_file($file);
+            if (!$xml) {
+                // Failed to load from cache, attempt to read from source
+                if ($CFG->debug) {
+                    print $filefailurestring . $file;
+                }
+                $xml = load_feed_from_url($url);
+                if ($xml) {
+                    // success
+                    $writetofile = true;
+                } else {
+                    // Failed to read from source as well!
+                    if ($CFG->debug) {
+                        print $urlfailurestring;
+                    }
+                    return;
+                }
+            }
+        }
+    } else { 
+        // No cached fil at all, read from source
+        $xml = load_feed_from_url($url);
+        if ($xml) {
+            //success
+            $writetofile = true;
+        } else {
+            // Failed to read from source url!
+            if ($CFG->debug) {
+                print $urlfailurestring;
+            }
+            return;
+        }
+    }
+    
+    //print_object($xml); //debug
+    if ($CFG->debug){
+        $xmlstr = implode(' ', $xml);
+    } else {
+        $xmlstr = @implode(' ', $xml);
+    }
+    
+    if ( $writetofile && !empty($xmlstr) ) { //write file to cache
+        // jlb: adding file:/ to the start of the file name fixed
+        // some caching problems that I was experiencing.
+        //$file="file:/" + $file;
+        file_put_contents($file, $xmlstr);
+    }
+    
+    if ($type == 'A') {
+        //note: Atom is being modified by a working group
+        //http://www.mnot.net/drafts/draft-nottingham-atom-format-02.html
+        include_once($CFG->dirroot .'/rss/class.Atom.php');
+        $atom = new Atom($xmlstr);
+        $atom->channel = $atom->feed;
+        $atom->items = $atom->entries;
+        $atom->channel['description'] = $atom->channel['tagline'];
+        for($i=0;$i<count($atom->items);$i++) {
+            $atom->items[$i]['description'] = $atom->items[$i]['content'];
+        }
+        return $atom;
+    } else {
+        include_once($CFG->dirroot .'/rss/class.RSS.php');
+        $rss = new MagpieRSS($xmlstr);
+        return $rss;
+    }
+}
+
+/**
+ * @param string $file The path to the cached feed to load
+ */
+function load_feed_from_file($file) {
+    global $CFG;
+//          echo "read from cache"; //debug
+    //read in from cache
+    if ($CFG->debug){
+        $xml = file($file);
+    } else {
+        $xml = @file($file);
+    }
+    return $xml;
+}
+
+/**
+ * @param string $url The url of the remote news feed to load
+ */
+function load_feed_from_url($url) {
+    global $CFG;
+//          echo "read from original"; //debug
+    //read from source
+    if ($CFG->debug){
+        $xml = file($url);
+    } else {
+        $xml = @file($url);
+    }
+    return $xml;
+}
+
+/**
+ * @param int $rssid .
+ */
+function rss_display_feeds($rssid='none') {
+    global $db, $USER, $CFG, $THEME;
+    global $blogid; //hackish, but if there is a blogid it would be good to preserve it
+
+    $closeTable = false;
+    //Daryl Hawes note: convert this sql statement to a moodle function call
+    if ($rssid != 'none'){
+        $sql = 'SELECT * FROM '. $CFG->prefix .'block_rss_client WHERE id='. $rssid;
+    } else {
+        $sql = 'SELECT * FROM '. $CFG->prefix .'block_rss_client';
+    }
+    
+    $res = $db->Execute($sql);
+//    print_object($res); //debug
+    
+    if ($res->fields){
+        $closeTable = true;
+        ?>
+            <table width="100%">
+            <tr bgcolor="<?php echo $THEME->cellheading;?>" class="forumpostheadertopic">
+                <td><?php print_string('block_rss_feed', 'block_rss_client'); ?></td>
+                <td><?php print_string('edit'); ?></td>
+                <td><?php print_string('delete'); ?></td>
+            </tr>
+        <?php
+    }
+    
+    if (isset($res) && $res->fields){
+        while(!$res->EOF) {
+            $editString = '&nbsp;';
+            $deleteString = '&nbsp;';
+            if ($res->fields['userid'] == $USER->id || isadmin()){
+                $editString = '<a href="'. $CFG->wwwroot .'/blocks/rss_client/block_rss_client_action.php?act=rss_edit&rssid='. $res->fields['id'] .'&blogid='. $blogid .'">';
+                $editString .= '<img src="'. $CFG->pixpath .'/t/edit.gif" alt="'. get_string('edit');
+$editString .= '" title="'. get_string('edit') .'" align="absmiddle" height=\"16\" width=\"16\" border=\"0\" /></a>';
+                
+                $deleteString = '<a href="'. $CFG->wwwroot .'/blocks/rss_client/block_rss_client_action.php?act=delfeed&rssid='. $res->fields['id'];
+                $deleteString .= '&blogid='. $blogid .'" onClick="return confirm(\''. get_string('block_rss_delete_feed_confirm', 'block_rss_client') .'\');">';
+                $deleteString .= '<img src="'. $CFG->pixpath .'/t/delete.gif" alt="'. get_string('delete');
+$deleteString .= '" title="'. get_string('delete') .'" align="absmiddle" border=\"0\" /></a>';
+            }
+            print '<tr bgcolor="'. $THEME->cellcontent .'" class="forumpostmessage"><td><strong><a href="'. $CFG->wwwroot .'/blocks/rss_client/block_rss_client_action.php?act=view&rssid=';
+            print $res->fields['id'] .'&blogid='. $blogid .'">'. $res->fields['title'] .'</a></strong><br />' ."\n";
+            print $res->fields['description'] .'&nbsp;<br />' ."\n";
+            print $res->fields['url'] .'&nbsp;&nbsp;<a href="'. $res->fields['url'] .'" target=_new><img src="'. $CFG->pixpath .'/blog/xml.gif" border="0" /></a>' ."\n";
+            print '<a href="http://feeds.archive.org/validator/check?url='. $res->fields['url'] .'">(Validate)</a>';
+            print '</td><td align="center">'. $editString .'</td>' ."\n";
+            print '<td align=\"center\">'. $deleteString .'</td>' ."\n";
+            print '</tr>'."\n";
+            $res->MoveNext();
+        }
+    }
+    if ($closeTable){
+        print '</table>'."\n";
+    }
+}
+
+/**
+ * @param string $act .
+ * @param string $url .
+ * @param int $rssid .
+ * @param string $rsstype .
+ * @param bool $printnow .
+ */
+function rss_get_form($act, $url, $rssid, $rsstype, $printnow=true) {
+    global $USER, $CFG, $_SERVER, $blockid, $blockaction;
+    global $blogid; //hackish, but if there is a blogid it would be good to preserve it
+
+    $returnstring = '<table><tr><td valign=\"top\">'; 
+    if ($act == 'rss_edit') { 
+        $returnstring .= get_string('edit'); 
+    } else { 
+        $returnstring .= get_string('block_rss_add_new', 'block_rss_client');
+    }
+    $returnstring .= '  '. get_string('block_rss_feed', 'block_rss_client');
+    
+    $returnstring .= '</td></tr><tr><td>';
+    
+    $returnstring .= '<form action="'. $_SERVER['PHP_SELF'] .'" method=POST name="block_rss">';
+    $returnstring .= 'URL: <input type="text" size="32" maxlength="128" name="url" value="';
+    if ($act == 'rss_edit') { 
+        $returnstring .= $url; 
+    } 
+    
+    $returnstring .= '" /><br /><select name="rsstype"><option value="R">RSS/RDF</option>
+    <option value="A"';
+    if ($act == 'rss_edit' and $rsstype == 'A') {
+        $returnstring .= ' selected';
+    } 
+    
+    $returnstring .= '>Atom</option></select>';
+    
+    $returnstring .= '<input type="hidden" name="act" value="';
+    if ($act == 'rss_edit') {
+        $returnstring .= 'updfeed';
+    } else {
+        $returnstring .= 'addfeed';
+    } 
+    $returnstring .= '" />';
+    if ($act == 'rss_edit') { 
+        $returnstring .= '<input type="hidden" name="rssid" value="'. $rssid .'" />'. "\n"; 
+    } 
+    $returnstring .= '<input type="hidden" name="blogid" value="'. $blogid .'" />';
+    $returnstring .= '<input type="hidden" name="user" value="'. $USER->id .'" />';
+    $returnstring .= '<input type="submit" value="';
+    if ($act == 'rss_edit') {
+        $returnstring .= get_string('update'); 
+    } else { 
+        $returnstring .= get_string('add'); 
+    }
+    $returnstring .= '" />&nbsp;</form>';
+    
+    $returnstring .= '<ul>' . get_string('block_rss_find_more_feeds', 'block_rss_client');
+// removed as this is possibly out of place here
+//    $returnstring .= '<li><a href="http://www.syndic8.com" target="_new">syndic8</a> <li><a href="http://www.newsisfree.com" target="_new">NewsIsFree</A>';
+    $returnstring .= '</ul>';
+    $returnstring .= '</td></tr></table>';
+    
+    if ($printnow){
+        print $returnstring;
+    }
+    return $returnstring;
+}
+
+/**
+ * added by Daryl Hawes for rss/atom feeds
+ * found at http://us4.php.net/manual/en/function.fwrite.php
+ * added check for moodle debug option. if off then use '@' to suppress error/warning messages
+ * @param string $filename .
+ * @param string $content .
+ */
+if (! function_exists('file_put_contents')){
+    function file_put_contents($filename, $content) {
+        global $CFG;
+        $nr_of_bytes = 0;
+        if ($CFG->debug){
+            if (($file = fopen($filename, 'w+')) === false) return false;
+        } else {
+            if (($file = @fopen($filename, 'w+')) === false) return false;
+        }
+        if ($CFG->debug){
+            if ($nr_of_bytes = fwrite($file, $content, strlen($content)) === false) return false;
+        } else {
+            if ($nr_of_bytes = @fwrite($file, $content, strlen($content)) === false) return false;
+        }        
+        fclose($file);
+        return $nr_of_bytes;
+    }
+}
 ?>